Lewes kneedler



ATENT FFICEQ Lawns KNEEDLER, or CALEDONIA,

IOWA, ASSIGNOR TO FERNANDO F.

LEATHERS, AND FREDERICK OFFENHAUSER, SR., AND JOHN N. LINE- BURG,TRUSTEES.

BALANCED SLI DE-VALVE.

SPECIFICATION forming part of Letters Patent No. 349,048, datedSeptember 14, 1886.

Application filed June 21, 1886. Serial No. 205,777.

To all whom it may concern:

Be it known that I, Lawns KNEEDLER, a citizen of the United States,residing at Caledonia, in the county of Ringgold and State ofIow-a,

have invented certain new and useful Improvements in BalanceSlide-Valves for Locomotives and other Steam-Engines; and I do declarethe following to be aTull', clear, and 'exact description of theinvention, such as 1o will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this i5 specification.

The invention will first be descrbedin con" nection with what isnecessary to a full understanding thereof, and then pointed out intheclaims. y

Figure 1 of the drawings is a longitudinal vertical section, and Fig. 2a perspective view. Y

In the drawings, A represents the ordinary slide-valve, with itssubjacent escape-cavity. I cast with this, and on the middle of the topthereof, the upright cylinder B, the escapecavity extending up into thecylinder, for the purpose of giving a greater escape.

Over the cylinder B, I place the cast-metal 3o hood C, iiled to anaccurate fit, so as to work freely over the cylinder when exposed to thegreatest expansive heat which may occur in a steam-chest.

In thecylinder B, I make the annular groove 3 5 b, in which is arrangedsuitable packing,pref

erably what is known as the Dunbar packing, and over this fits the hoodO. Beneath the hood, over the cylinder, and between the hood and valveA, I arrange the ordinary 4o yoke, D, which is turned and tiled fortheaction of the valves, as weil as connected to a valve-rod in the usualway,or in any approved manner. Between the yoke and hood is a space forthe action of steam on the rim of hood. This gives an automatic movementto the hood and holds it in position against the top or cap of thesteam-chest, so as to shut off all Steam from the top ofhood. Theadjacent surfaces of the hood-top and lowest surface of 5o chest aretrued, so as to make a steam-tight joint as the valve plays back andforth.

(No model.)

Near the top edge of cylinder, and in the bottom of the annular grooveb, an elastic steel ring, b', is closely tted, so as to spring atintervals and give an outward expansion.

. Around this ring is placed the set of Dunbar packing, so as to make asteam-tight packing orjoint with the inside surface of the hood.

The Dunbar packing and adjacentsurface of hood are filed to make asteamtight movable joint, so as to permit of the motion of hood underthe influence of the steam on its lowest rim.

On top of the cylinder are formed two cavities, bbin which I arrangesprings E E,either elliptical or spiral, to hold the hood against thelid or cap of the steam-chest when steam has been shut off. Thisprevents thehood from dropping away from the steam-chest, lid, or cap,and admitting air or steam. This makes a balance slide-valve in whichthere will not be unequal wear, which greatly lessens the friction andstrain on the valve-gear and the slipping of the eccentric; also, thequadrant for reversing lever may be used as well when the throttle isopen as when steam is shut off; also, steam riding and friction are to agreat extent avoided. Thus it will be seen that my invention ischaracterized by great simplicity, little liability to get out of order,a great saving of fuel, a gain of power, a great reduction of friction,an equal wear, and great durability. Indeed, with care my valve willwear out an engine with little or no repair.

Having thus described my invention, what I claim as new, and desire toprotect by Letters Patent, is-

l. The combination, with the cylinder and hood B O,of the elastic steelring b', arranged in the annular groove b and surrounded by packing7substantially as specied.

2. The combination,with a balance-valve, cylinder B, and hood C, of thesprings E E, ar'

ranged in grooves or cavities in the top of" cylinder, as and for thepurpose described.

In testimony whereof I have affixed my signature in presence of twowitnessses.

LEVVES KNEEDLER.

Witnesses:

W. A. DE CAsHMUTr, F. OFFENHAUsER.

